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Nancy and Elsa like to ride bikes. The equation m=12h represents the approximate number of miles m Nancy bikes in h hours. The equation m=9h represents the approximate number of miles m Elsa bikes in h hours. How much longer will it take Elsa to bike 72 miles than Nancy?

Respuesta :

Answer:

2 hours

Step-by-step explanation:

substitute m = 72 into both equations and solve for h

72 = 12h ( divide both sides by 12 )

6 = h

Takes Nancy 6 hours to cycle 72 miles

72 = 9h ( divide both sides by 9 )

8 = h

Takes Elsa 8 hours to cycle 72 miles

Elsa takes 2 hours longer than Nancy to cycle 72 miles

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